Polypotentiostat

Description

With this polypotentiostat one electrochemical cell can be equipped with 1, 2, 3 or 4 working electrodes and all of these will be measured parallel. The EmStat3 4WE consists of a standard EmStat3 potentiostat and additionally three bipotentiostat modules, thus all techniques an EmStat3 is capable of are available for the EmStat3 4WE.

  1. The potential of the additional WE has a constant dc-potential offset with respect to WE1, i.e. it is following the potential change of WE1.
  2. The potential of the additional WE has an independent fixed dc-potential.

Each potentiostat has eight current ranges: 1 nA to 10 mA with a resolution of 1 pA at the lowest current range and can automatically select the optimal current range.

A cell can be setup with one reference and one counter electrode or one combined reference and counter electrode.

The current is measured using a zero resistance ammeter (ZRA).

Techniques

All supported techniques for EmStat3 4WE:

Voltammetric techniques

  • Linear sweep voltammetry (LSV)
  • Differential pulse voltammetry (DPV)
  • Square wave voltammetry (SWV)
  • Normal pulse voltammetry (NPV)
  • Cyclic voltammetry (CV)

These methods can all be used in their stripping modes which are applied for (ultra-) trace analysis.

Technique as a function of time:

  • Amperometric detection (AD) (Chronoamperometry)
  • Pulsed amperometric detection (PAD)
  • Multiple pulse amperometry (MPAD)
  • Open circuit potentiometry (OCP)
  • Multistep amperometry (MA)

The additional WE’s can each individually be used in two different modes:

  1. The potential of the additional WE has a constant dc-potential offset with respect to WE1
  2. The potential of the additional WE has an independent fixed dc-potential

Specifications

EmStat3 4WE Main potentiostat Polypotentiostat modules
DC-potential range ± 3.000 V ± 3.000 V
Compliance voltage ± 5 V ± 5 V
DC-potential resolution 0.1 mV 0.1 mV
Max. dc-offset error 2 mV 3 mV
Potential accuracy 0.2 % 0.2 %
Current ranges 1 nA to 10 mA (8 ranges) 1 nA to 10 mA (8 ranges)
Maximum current ± 20 mA typical and ± 15 mA minimum for the sum of WE1, W2, W3 and W4
Current resolution 0.1% of current range, 1 pA at lowest current range/td>
Electrometer amplifier input > 100 GOhm // 4 pF > 100 GOhm // 4 pF
Rise time approx. 100 μs approx. 100 μs

Housing:

Dimensions 12 cm x 8.5 cm x 3,5 cm
Weight 250 g
Power 5 V external power supply (included)
Interfacing USB
PC recommendations Windows Vista, 7 and 8 (32 and 64 bit) Dual core processor with 2 GB RAM

The current is measured using a zero resistance ammeter (ZRA).

 

Ordering information

PALM-ES3/4WE PalmSens Emstat3 Polypotentiostat-3 with integrated Bipot modules for We